Definify.com
Webster 1913 Edition
Hydraulic
Hy-drau′lic
,Adj.
[F.
hydraulique
, L. hydraulicus
, fr. Gr. [GREEK], [GREEK], a water organ; ὕδωρ
water + [GREEK] flute, pipe. See Hydra
.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water;
as, an
. hydraulic
clock, crane, or dockHydraulic accumulator
, an accumulator for hydraulic machinery of any kind. See
– Accumulator
, 2. Hydraulic brake
, a cataract. See
– Cataract
, 3. Hydraulic cement
, a cement or mortar made of hydraulic lime, which will harden under water.
– Hydraulic elevator
, a lift operated by the weight or pressure of water.
– Hydraulic jack
. See under
– Jack
. Hydraulic lime
, quicklime obtained from hydraulic limestone, and used for cementing under water, etc.
– Hydraulic limestone
, a limestone which contains some clay, and which yields a quicklime that will set, or form a firm, strong mass, under water.
– Hydraulic main
(Gas Works)
, a horizontal pipe containing water at the bottom into which the ends of the pipes from the retorts dip, for passing the gas through water in order to remove ammonia.
– Hydraulic mining
, a system of mining in which the force of a jet of water is used to wash down a bank of gold-bearing gravel or earth.
[Pacific Coast]
– Hydraulic press
, a hydrostatic press. See under
– Hydrostatic
. Hydraulic propeller
, a device for propelling ships by means of a stream of water ejected under water rearward from the ship.
– Hydraulic ram
, a machine for raising water by means of the energy of the moving water of which a portion is to be raised. When the rush of water through the main pipe
– d
shuts the valve at a
, the momentum of the current thus suddenly checked forces part of it into the air chamber b
, and up the pipe c
, its return being prevented by a valve at the entrance to the air chamber, while the dropping of the valve a
by its own weight allows another rush through the main pipe, and so on alternately. Hydraulic valve
. (Mach.)
(a)
A valve for regulating the distribution of water in the cylinders of hydraulic elevators, cranes, etc.
(b)
(Gas Works)
An inverted cup with a partition dipping into water, for opening or closing communication between two gas mains, the open ends of which protrude about the water.